src/surf/cpu_im.c

   1 /* Copyright (c) 2009-2011. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "surf_private.h"
   8 #include "surf/surf_resource.h"
   9
  10
  11 #undef GENERIC_LMM_ACTION
  12 #undef GENERIC_ACTION
  13 #undef ACTION_GET_CPU
  14 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  15 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  16 #define ACTION_GET_CPU(action) ((surf_action_cpu_Cas01_im_t) action)->cpu
  17
  18 typedef struct surf_action_cpu_cas01_im {
  19   s_surf_action_lmm_t generic_lmm_action;
  20   s_xbt_swag_hookup_t cpu_list_hookup;
  21   int index_heap;
  22   void *cpu;
  23 } s_surf_action_cpu_Cas01_im_t, *surf_action_cpu_Cas01_im_t;
  24
  25 typedef struct cpu_Cas01_im {
  26   s_surf_resource_t generic_resource;
  27   s_xbt_swag_hookup_t modified_cpu_hookup;
  28   double power_peak;
  29   double power_scale;
  30   tmgr_trace_event_t power_event;
  31   int core;
  32   e_surf_resource_state_t state_current;
  33   tmgr_trace_event_t state_event;
  34   lmm_constraint_t constraint;
  35   xbt_swag_t action_set;
  36   double last_update;
  37 } s_cpu_Cas01_im_t, *cpu_Cas01_im_t;
  38
  39 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_cpu_im, surf,
  40                                 "Logging specific to the SURF CPU IMPROVED module");
  41
  42
  43 lmm_system_t cpu_im_maxmin_system = NULL;
  44 static xbt_swag_t cpu_im_modified_cpu = NULL;
  45 static xbt_heap_t cpu_im_action_heap = NULL;
  46 extern int sg_maxmin_selective_update;
  47
  48
  49 static xbt_swag_t
  50     cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
  51
  52 static void* cpu_im_create_resource(const char *name, double power_peak,
  53                                  double power_scale,
  54                                  tmgr_trace_t power_trace,
  55                                  int core,
  56                                  e_surf_resource_state_t state_initial,
  57                                  tmgr_trace_t state_trace,
  58                                  xbt_dict_t cpu_properties)
  59 {
  60   cpu_Cas01_im_t cpu = NULL;
  61   s_surf_action_cpu_Cas01_im_t action;
  62
  63   xbt_assert(!surf_cpu_resource_by_name(name),
  64               "Host '%s' declared several times in the platform file",
  65               name);
  66   cpu = (cpu_Cas01_im_t) surf_resource_new(sizeof(s_cpu_Cas01_im_t),
  67           surf_cpu_model, name,cpu_properties);
  68   cpu->power_peak = power_peak;
  69   xbt_assert(cpu->power_peak > 0, "Power has to be >0");
  70   cpu->power_scale = power_scale;
  71   if (power_trace)
  72     cpu->power_event =
  73         tmgr_history_add_trace(history, power_trace, 0.0, 0, cpu);
  74   cpu->core = core;
  75   xbt_assert(core>0,"Invalid number of cores %d",core);
  76
  77   cpu->state_current = state_initial;
  78   if (state_trace)
  79     cpu->state_event =
  80         tmgr_history_add_trace(history, state_trace, 0.0, 0, cpu);
  81
  82   cpu->constraint =
  83       lmm_constraint_new(cpu_im_maxmin_system, cpu,
  84                          cpu->core * cpu->power_scale * cpu->power_peak);
  85
  86   xbt_lib_set(host_lib, name, SURF_CPU_LEVEL, cpu);
  87   cpu->action_set = xbt_swag_new(xbt_swag_offset(action, cpu_list_hookup));
  88
  89   return cpu;
  90 }
  91
  92
  93 static void parse_cpu_im_init(sg_platf_host_cbarg_t host)
  94 {
  95         cpu_im_create_resource(host->id,
  96                           host->power_peak,
  97                           host->power_scale,
  98                           host->power_trace,
  99                           host->core_amount,
 100                           host->initial_state,
 101                           host->state_trace,
 102                           host->properties);
 103 }
 104
 105 static void cpu_im_add_traces_cpu(void)
 106 {
 107   xbt_dict_cursor_t cursor = NULL;
 108   char *trace_name, *elm;
 109   static int called = 0;
 110   if (called)
 111     return;
 112   called = 1;
 113
 114   /* connect all traces relative to hosts */
 115   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 116     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 117     cpu_Cas01_im_t host = surf_cpu_resource_by_name(elm);
 118
 119     xbt_assert(host, "Host %s undefined", elm);
 120     xbt_assert(trace, "Trace %s undefined", trace_name);
 121
 122     host->state_event =
 123         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 124   }
 125
 126   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 127     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 128     cpu_Cas01_im_t host = surf_cpu_resource_by_name(elm);
 129
 130     xbt_assert(host, "Host %s undefined", elm);
 131     xbt_assert(trace, "Trace %s undefined", trace_name);
 132
 133     host->power_event =
 134         tmgr_history_add_trace(history, trace, 0.0, 0, host);
 135   }
 136 }
 137
 138 static void cpu_im_define_callbacks()
 139 {
 140   sg_platf_host_add_cb(parse_cpu_im_init);
 141   sg_platf_postparse_add_cb(cpu_im_add_traces_cpu);
 142 }
 143
 144 static int cpu_im_resource_used(void *resource)
 145 {
 146   return lmm_constraint_used(cpu_im_maxmin_system,
 147                              ((cpu_Cas01_im_t) resource)->constraint);
 148 }
 149
 150 static int cpu_im_action_unref(surf_action_t action)
 151 {
 152   action->refcount--;
 153   if (!action->refcount) {
 154     xbt_swag_remove(action, action->state_set);
 155     if (((surf_action_lmm_t) action)->variable)
 156       lmm_variable_free(cpu_im_maxmin_system,
 157                         ((surf_action_lmm_t) action)->variable);
 158     /* remove from heap */
 159     xbt_heap_remove(cpu_im_action_heap,
 160                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 161     xbt_swag_remove(action,
 162                     ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 163     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 164 #ifdef HAVE_TRACING
 165     if (action->category)
 166       xbt_free(action->category);
 167 #endif
 168     surf_action_free(&action);
 169     return 1;
 170   }
 171   return 0;
 172 }
 173
 174 static void cpu_im_action_cancel(surf_action_t action)
 175 {
 176   surf_action_state_set(action, SURF_ACTION_FAILED);
 177   xbt_heap_remove(cpu_im_action_heap,
 178                   ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 179   xbt_swag_remove(action,
 180                   ((cpu_Cas01_im_t) ACTION_GET_CPU(action))->action_set);
 181   return;
 182 }
 183
 184 static void cpu_im_cpu_action_state_set(surf_action_t action,
 185                                         e_surf_action_state_t state)
 186 {
 187 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 188 /*     if(((surf_action_lmm_t)action)->variable) { */
 189 /*       lmm_variable_disable(cpu_im_maxmin_system, ((surf_action_lmm_t)action)->variable); */
 190 /*       ((surf_action_lmm_t)action)->variable = NULL; */
 191 /*     } */
 192
 193   surf_action_state_set(action, state);
 194   return;
 195 }
 196
 197 static void cpu_im_update_remains(cpu_Cas01_im_t cpu, double now)
 198 {
 199   surf_action_cpu_Cas01_im_t action;
 200
 201   if (cpu->last_update >= now)
 202     return;
 203   xbt_swag_foreach(action, cpu->action_set) {
 204     if (GENERIC_ACTION(action).state_set !=
 205         surf_cpu_model->states.running_action_set)
 206       continue;
 207
 208     /* bogus priority, skip it */
 209     if (GENERIC_ACTION(action).priority <= 0)
 210       continue;
 211
 212     if (GENERIC_ACTION(action).remains > 0) {
 213       double_update(&(GENERIC_ACTION(action).remains),
 214                     lmm_variable_getvalue(GENERIC_LMM_ACTION
 215                                           (action).variable) * (now -
 216                                                                 cpu->last_update));
 217 #ifdef HAVE_TRACING
 218       if (TRACE_is_enabled()) {
 219         TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 220                                         action->
 221                                         generic_lmm_action.generic_action.
 222                                         data, (surf_action_t) action,
 223                                         lmm_variable_getvalue
 224                                         (GENERIC_LMM_ACTION
 225                                          (action).variable),
 226                                         cpu->last_update,
 227                                         now - cpu->last_update);
 228       }
 229 #endif
 230       XBT_DEBUG("Update action(%p) remains %lf", action,
 231              GENERIC_ACTION(action).remains);
 232     }
 233   }
 234   cpu->last_update = now;
 235 }
 236
 237 static double cpu_im_share_resources(double now)
 238 {
 239   surf_action_cpu_Cas01_im_t action;
 240   double min;
 241   double value;
 242   cpu_Cas01_im_t cpu, cpu_next;
 243
 244   xbt_swag_foreach(cpu, cpu_im_modified_cpu)
 245       cpu_im_update_remains(cpu, now);
 246
 247   lmm_solve(cpu_im_maxmin_system);
 248
 249   xbt_swag_foreach_safe(cpu, cpu_next, cpu_im_modified_cpu) {
 250     xbt_swag_foreach(action, cpu->action_set) {
 251       if (GENERIC_ACTION(action).state_set !=
 252           surf_cpu_model->states.running_action_set)
 253         continue;
 254
 255       /* bogus priority, skip it */
 256       if (GENERIC_ACTION(action).priority <= 0)
 257         continue;
 258
 259       min = -1;
 260       value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 261       if (value > 0) {
 262         if (GENERIC_ACTION(action).remains > 0) {
 263           value = GENERIC_ACTION(action).remains / value;
 264           min = now + value;
 265         } else {
 266           value = 0.0;
 267           min = now;
 268         }
 269       }
 270
 271       if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 272           && (min == -1
 273               || GENERIC_ACTION(action).start +
 274               GENERIC_ACTION(action).max_duration < min))
 275         min =
 276             GENERIC_ACTION(action).start +
 277             GENERIC_ACTION(action).max_duration;
 278
 279       XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 280              GENERIC_ACTION(action).start, now + value,
 281              GENERIC_ACTION(action).max_duration);
 282
 283       if (action->index_heap >= 0) {
 284         surf_action_cpu_Cas01_im_t heap_act =
 285             xbt_heap_remove(cpu_im_action_heap, action->index_heap);
 286         if (heap_act != action)
 287           DIE_IMPOSSIBLE;
 288       }
 289       if (min != -1) {
 290         xbt_heap_push(cpu_im_action_heap, action, min);
 291         XBT_DEBUG("Insert at heap action(%p) min %lf", action, min);
 292       }
 293     }
 294     xbt_swag_remove(cpu, cpu_im_modified_cpu);
 295   }
 296   return xbt_heap_size(cpu_im_action_heap) >
 297       0 ? xbt_heap_maxkey(cpu_im_action_heap) - now : -1;
 298 }
 299
 300 static void cpu_im_update_actions_state(double now, double delta)
 301 {
 302   surf_action_cpu_Cas01_im_t action;
 303
 304   while ((xbt_heap_size(cpu_im_action_heap) > 0)
 305          && (double_equals(xbt_heap_maxkey(cpu_im_action_heap), now))) {
 306     action = xbt_heap_pop(cpu_im_action_heap);
 307     XBT_DEBUG("Action %p: finish", action);
 308     GENERIC_ACTION(action).finish = surf_get_clock();
 309     /* set the remains to 0 due to precision problems when updating the remaining amount */
 310 #ifdef HAVE_TRACING
 311     if (TRACE_is_enabled()) {
 312       cpu_Cas01_im_t cpu = ((cpu_Cas01_im_t)(action->cpu));
 313       TRACE_surf_host_set_utilization(cpu->generic_resource.name,
 314           action->generic_lmm_action.generic_action.data,
 315           (surf_action_t) action,
 316           lmm_variable_getvalue (GENERIC_LMM_ACTION(action).variable),
 317           cpu->last_update,
 318           now - cpu->last_update);
 319     }
 320 #endif
 321     GENERIC_ACTION(action).remains = 0;
 322     cpu_im_cpu_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 323     cpu_im_update_remains(action->cpu, surf_get_clock());
 324   }
 325 #ifdef HAVE_TRACING
 326   if (TRACE_is_enabled()) {
 327     //defining the last timestamp that we can safely dump to trace file
 328     //without losing the event ascending order (considering all CPU's)
 329     void **data;
 330     cpu_Cas01_im_t cpu;
 331     xbt_lib_cursor_t cursor;
 332     char *key;
 333     double smaller = -1;
 334     xbt_lib_foreach(host_lib, cursor, key, data){
 335       if(data[SURF_CPU_LEVEL]){
 336         cpu = data[SURF_CPU_LEVEL];
 337         if (smaller < 0){
 338           smaller = cpu->last_update;
 339           continue;
 340         }
 341         if (cpu->last_update < smaller){
 342           smaller = cpu->last_update;
 343         }
 344       }
 345     }
 346     if (smaller > 0) {
 347       TRACE_last_timestamp_to_dump = smaller;
 348     }
 349   }
 350 #endif
 351   return;
 352 }
 353
 354 static void cpu_im_update_resource_state(void *id,
 355                                          tmgr_trace_event_t event_type,
 356                                          double value, double date)
 357 {
 358   cpu_Cas01_im_t cpu = id;
 359   lmm_variable_t var = NULL;
 360   lmm_element_t elem = NULL;
 361
 362   if (event_type == cpu->power_event) {
 363     cpu->power_scale = value;
 364     lmm_update_constraint_bound(cpu_im_maxmin_system, cpu->constraint,
 365                                 cpu->core * cpu->power_scale * cpu->power_peak);
 366 #ifdef HAVE_TRACING
 367     TRACE_surf_host_set_power(date, cpu->generic_resource.name,
 368                               cpu->core * cpu->power_scale * cpu->power_peak);
 369 #endif
 370     while ((var = lmm_get_var_from_cnst
 371             (cpu_im_maxmin_system, cpu->constraint, &elem))) {
 372         surf_action_cpu_Cas01_im_t action = lmm_variable_id(var);
 373         lmm_update_variable_bound(cpu_im_maxmin_system, action->generic_lmm_action.variable,
 374                                   cpu->power_scale * cpu->power_peak);
 375     }
 376     xbt_swag_insert(cpu, cpu_im_modified_cpu);
 377     if (tmgr_trace_event_free(event_type))
 378       cpu->power_event = NULL;
 379   } else if (event_type == cpu->state_event) {
 380     if (value > 0)
 381       cpu->state_current = SURF_RESOURCE_ON;
 382     else {
 383       lmm_constraint_t cnst = cpu->constraint;
 384       lmm_variable_t var = NULL;
 385       lmm_element_t elem = NULL;
 386
 387       cpu->state_current = SURF_RESOURCE_OFF;
 388
 389       while ((var =
 390               lmm_get_var_from_cnst(cpu_im_maxmin_system, cnst, &elem))) {
 391         surf_action_t action = lmm_variable_id(var);
 392
 393         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 394             surf_action_state_get(action) == SURF_ACTION_READY ||
 395             surf_action_state_get(action) ==
 396             SURF_ACTION_NOT_IN_THE_SYSTEM) {
 397           action->finish = date;
 398           cpu_im_cpu_action_state_set(action, SURF_ACTION_FAILED);
 399         }
 400       }
 401     }
 402     if (tmgr_trace_event_free(event_type))
 403       cpu->state_event = NULL;
 404   } else {
 405     XBT_CRITICAL("Unknown event ! \n");
 406     xbt_abort();
 407   }
 408
 409   return;
 410 }
 411
 412 static surf_action_t cpu_im_execute(void *cpu, double size)
 413 {
 414   surf_action_cpu_Cas01_im_t action = NULL;
 415   cpu_Cas01_im_t CPU = cpu;
 416
 417   XBT_IN("(%s,%g)", surf_resource_name(CPU), size);
 418   action =
 419       surf_action_new(sizeof(s_surf_action_cpu_Cas01_im_t), size,
 420                       surf_cpu_model,
 421                       CPU->state_current != SURF_RESOURCE_ON);
 422
 423   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 424                                                    calloc but it seems to help valgrind... */
 425
 426   GENERIC_LMM_ACTION(action).variable =
 427       lmm_variable_new(cpu_im_maxmin_system, action,
 428                        GENERIC_ACTION(action).priority, CPU->power_scale * CPU->power_peak, 1);
 429   action->index_heap = -1;
 430   action->cpu = CPU;
 431   xbt_swag_insert(CPU, cpu_im_modified_cpu);
 432   xbt_swag_insert(action, CPU->action_set);
 433   lmm_expand(cpu_im_maxmin_system, CPU->constraint,
 434              GENERIC_LMM_ACTION(action).variable, 1.0);
 435   XBT_OUT();
 436   return (surf_action_t) action;
 437 }
 438
 439 static surf_action_t cpu_im_action_sleep(void *cpu, double duration)
 440 {
 441   surf_action_cpu_Cas01_im_t action = NULL;
 442
 443   if (duration > 0)
 444     duration = MAX(duration, MAXMIN_PRECISION);
 445
 446   XBT_IN("(%s,%g)", surf_resource_name(cpu), duration);
 447   action = (surf_action_cpu_Cas01_im_t) cpu_im_execute(cpu, 1.0);
 448   GENERIC_ACTION(action).max_duration = duration;
 449   GENERIC_LMM_ACTION(action).suspended = 2;
 450   if (duration == NO_MAX_DURATION) {
 451     /* Move to the *end* of the corresponding action set. This convention
 452        is used to speed up update_resource_state  */
 453     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 454     ((surf_action_t) action)->state_set =
 455         cpu_im_running_action_set_that_does_not_need_being_checked;
 456     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 457   }
 458
 459   lmm_update_variable_weight(cpu_im_maxmin_system,
 460                              GENERIC_LMM_ACTION(action).variable, 0.0);
 461   xbt_swag_insert(cpu, cpu_im_modified_cpu);
 462   XBT_OUT();
 463   return (surf_action_t) action;
 464 }
 465
 466 static void cpu_im_action_suspend(surf_action_t action)
 467 {
 468   XBT_IN("(%p)", action);
 469   if (((surf_action_lmm_t) action)->suspended != 2) {
 470     lmm_update_variable_weight(cpu_im_maxmin_system,
 471                                ((surf_action_lmm_t) action)->variable,
 472                                0.0);
 473     ((surf_action_lmm_t) action)->suspended = 1;
 474     xbt_heap_remove(cpu_im_action_heap,
 475                     ((surf_action_cpu_Cas01_im_t) action)->index_heap);
 476     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 477   }
 478   XBT_OUT();
 479 }
 480
 481 static void cpu_im_action_resume(surf_action_t action)
 482 {
 483
 484   XBT_IN("(%p)", action);
 485   if (((surf_action_lmm_t) action)->suspended != 2) {
 486     lmm_update_variable_weight(cpu_im_maxmin_system,
 487                                ((surf_action_lmm_t) action)->variable,
 488                                action->priority);
 489     ((surf_action_lmm_t) action)->suspended = 0;
 490     xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 491   }
 492   XBT_OUT();
 493 }
 494
 495 static int cpu_im_action_is_suspended(surf_action_t action)
 496 {
 497   return (((surf_action_lmm_t) action)->suspended == 1);
 498 }
 499
 500 static void cpu_im_action_set_max_duration(surf_action_t action,
 501                                            double duration)
 502 {
 503   XBT_IN("(%p,%g)", action, duration);
 504
 505   action->max_duration = duration;
 506   /* insert cpu in modified_cpu set to notice the max duration change */
 507   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 508   XBT_OUT();
 509 }
 510
 511 static void cpu_im_action_set_priority(surf_action_t action,
 512                                        double priority)
 513 {
 514   XBT_IN("(%p,%g)", action, priority);
 515   action->priority = priority;
 516   lmm_update_variable_weight(cpu_im_maxmin_system,
 517                              ((surf_action_lmm_t) action)->variable,
 518                              priority);
 519
 520   xbt_swag_insert(ACTION_GET_CPU(action), cpu_im_modified_cpu);
 521   XBT_OUT();
 522 }
 523
 524 #ifdef HAVE_TRACING
 525 static void cpu_im_action_set_category(surf_action_t action,
 526                                        const char *category)
 527 {
 528   XBT_IN("(%p,%s)", action, category);
 529   action->category = xbt_strdup (category);
 530   XBT_OUT();
 531 }
 532 #endif
 533
 534 static double cpu_im_action_get_remains(surf_action_t action)
 535 {
 536   XBT_IN("(%p)", action);
 537   /* update remains before return it */
 538   cpu_im_update_remains(ACTION_GET_CPU(action), surf_get_clock());
 539   return action->remains;
 540   XBT_OUT();
 541 }
 542
 543 static e_surf_resource_state_t cpu_im_get_state(void *cpu)
 544 {
 545   return ((cpu_Cas01_im_t) cpu)->state_current;
 546 }
 547
 548 static double cpu_im_get_speed(void *cpu, double load)
 549 {
 550   return load * (((cpu_Cas01_im_t) cpu)->power_peak);
 551 }
 552
 553 static double cpu_im_get_available_speed(void *cpu)
 554 {
 555   /* number between 0 and 1 */
 556   return ((cpu_Cas01_im_t) cpu)->power_scale;
 557 }
 558
 559 static void cpu_im_action_update_index_heap(void *action, int i)
 560 {
 561   ((surf_action_cpu_Cas01_im_t) action)->index_heap = i;
 562 }
 563
 564 static void cpu_im_finalize(void)
 565 {
 566   void **cpu;
 567   xbt_lib_cursor_t cursor;
 568   char *key;
 569
 570   xbt_lib_foreach(host_lib, cursor, key, cpu){
 571           if(cpu[SURF_CPU_LEVEL])
 572           {
 573                     cpu_Cas01_im_t CPU = cpu[SURF_CPU_LEVEL];
 574                     xbt_swag_free(CPU->action_set);
 575           }
 576   }
 577
 578   lmm_system_free(cpu_im_maxmin_system);
 579   cpu_im_maxmin_system = NULL;
 580
 581   surf_model_exit(surf_cpu_model);
 582   surf_cpu_model = NULL;
 583
 584   xbt_swag_free
 585       (cpu_im_running_action_set_that_does_not_need_being_checked);
 586   cpu_im_running_action_set_that_does_not_need_being_checked = NULL;
 587   xbt_heap_free(cpu_im_action_heap);
 588   xbt_swag_free(cpu_im_modified_cpu);
 589 }
 590
 591 static void surf_cpu_im_model_init_internal(void)
 592 {
 593   s_surf_action_t action;
 594   s_cpu_Cas01_im_t cpu;
 595
 596   surf_cpu_model = surf_model_init();
 597
 598   cpu_im_running_action_set_that_does_not_need_being_checked =
 599       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 600
 601   surf_cpu_model->name = "CPU_IM";
 602
 603   surf_cpu_model->action_unref = cpu_im_action_unref;
 604   surf_cpu_model->action_cancel = cpu_im_action_cancel;
 605   surf_cpu_model->action_state_set = cpu_im_cpu_action_state_set;
 606
 607   surf_cpu_model->model_private->resource_used = cpu_im_resource_used;
 608   surf_cpu_model->model_private->share_resources = cpu_im_share_resources;
 609   surf_cpu_model->model_private->update_actions_state =
 610       cpu_im_update_actions_state;
 611   surf_cpu_model->model_private->update_resource_state =
 612       cpu_im_update_resource_state;
 613   surf_cpu_model->model_private->finalize = cpu_im_finalize;
 614
 615   surf_cpu_model->suspend = cpu_im_action_suspend;
 616   surf_cpu_model->resume = cpu_im_action_resume;
 617   surf_cpu_model->is_suspended = cpu_im_action_is_suspended;
 618   surf_cpu_model->set_max_duration = cpu_im_action_set_max_duration;
 619   surf_cpu_model->set_priority = cpu_im_action_set_priority;
 620 #ifdef HAVE_TRACING
 621   surf_cpu_model->set_category = cpu_im_action_set_category;
 622 #endif
 623   surf_cpu_model->get_remains = cpu_im_action_get_remains;
 624
 625   surf_cpu_model->extension.cpu.execute = cpu_im_execute;
 626   surf_cpu_model->extension.cpu.sleep = cpu_im_action_sleep;
 627
 628   surf_cpu_model->extension.cpu.get_state = cpu_im_get_state;
 629   surf_cpu_model->extension.cpu.get_speed = cpu_im_get_speed;
 630   surf_cpu_model->extension.cpu.get_available_speed =
 631       cpu_im_get_available_speed;
 632   surf_cpu_model->extension.cpu.create_resource = cpu_im_create_resource;
 633   surf_cpu_model->extension.cpu.add_traces = cpu_im_add_traces_cpu;
 634
 635   if (!cpu_im_maxmin_system) {
 636     sg_maxmin_selective_update = 1;
 637     cpu_im_maxmin_system = lmm_system_new();
 638   }
 639   cpu_im_action_heap = xbt_heap_new(8, NULL);
 640   xbt_heap_set_update_callback(cpu_im_action_heap,
 641                                cpu_im_action_update_index_heap);
 642   cpu_im_modified_cpu =
 643       xbt_swag_new(xbt_swag_offset(cpu, modified_cpu_hookup));
 644 }
 645
 646 /*********************************************************************/
 647 /* Basic sharing model for CPU: that is where all this started... ;) */
 648 /*********************************************************************/
 649 /* @InProceedings{casanova01simgrid, */
 650 /*   author =       "H. Casanova", */
 651 /*   booktitle =    "Proceedings of the IEEE Symposium on Cluster Computing */
 652 /*                  and the Grid (CCGrid'01)", */
 653 /*   publisher =    "IEEE Computer Society", */
 654 /*   title =        "Simgrid: {A} Toolkit for the Simulation of Application */
 655 /*                  Scheduling", */
 656 /*   year =         "2001", */
 657 /*   month =        may, */
 658 /*   note =         "Available at */
 659 /*                  \url{http://grail.sdsc.edu/papers/simgrid_ccgrid01.ps.gz}." */
 660 /* } */
 661 void surf_cpu_model_init_Cas01_im()
 662 {
 663   if (surf_cpu_model)
 664     return;
 665   surf_cpu_im_model_init_internal();
 666   cpu_im_define_callbacks();
 667   xbt_dynar_push(model_list, &surf_cpu_model);
 668 }